I found this forum, thought cool mabie I can get a little help with a carb on one of these motors it is a cns3 good little carb too by the way. seems like if any of you realy knew ANYthing about this carb like mabie you would share but like everthing else its a trade secret **** I figured it out good little carb too runs like no other only thing Ill tell you is drill the main jet out to 0.030 youll see the diffrence I did and do.thats the only problem with these little gems